Creating a current date line on a graph

[Nills]

I have a simple line graph showing actual values of cash balances along with forward projections. It would be most useful if the graph could show either
The current days value as a highlighted value
or
A vertical line that will move on a daily basis to show where the values are in respect of actual and projected. (this would appear like the vertical line on some TV guide menus)

[Andy Pope]

http://www.andypope.info/ngs/ng25.htm